Drawing apparatus for spinning-machines.



" PATENTED MAY 5, 1903.

I. TER WEBLE.

DRAWING APPARATUS FOR SPINNING MACHINES.

APBLIUATION FILED AUG. 26, 1902.

10 MODEL.

lIO

UN1rn STATES Patented May 5, 1903.

PATENT OFFICE.

DRAWING APPARATUS FOR SPINNING-MACHINES.

$PECIFIGATION forming part of Letters Patent No. 727,518, dated May 5, 1903. Application filed August 26, 1902- Serial No. 121,088. (No model.)

To all whom it may concern.-

Be it known that I, Fnr'mr'znro 'IER WEELE, engineer, a subject of the Queen of the Netherlands, residing at St. Die, department of Vosges, France, have invented a certain new and useful Improvementin Drawing Apparatus of Spinning, Combing, and theLike Machines, of which the following is a full, clear, and exact description.

This invention relates to improvements connected with drawing apparatus employed in spinning and in combingfor the purpose of reducing to a minimum the pressure to be exerted upon the pressing cylinders or rolls and in order, consequently, to insure to these cylinders a longer life, and especially to produce a more regular draft.

Present-day drawing frames or apparatus are composed, as is well known, of drawingrolls, properly callec channeled or smooth, and of pressure-rolls covered with leather, india-rubber, paper, or other compressible material, the said rolls being coupled in pairs. In these present arrangements the pressure-rolls are most often forced or drawn upon the drawing-rolls by means of weights, and it is by virtue of this pressure or of the pressure resulting from the weight of these rolls that the rotation or drive is effected; but itis worthy of note that this pressure acts by strongly impressing the compressible material of the pressure-rolls into the metallic channels or grooves of the draw ing-rolls. It is further to be noted that the thicker the band of fibers (cotton or other material) the more considerable must be the pressure to be exerted. The enormous pressure to which it is most often necessary to have recourse entails numerous inconveniences, such as rapidly deteriorating the leather of the pressure-rolls, heating the cylinders arranged oppositely in pairs, setting up electricity in the band or sliver which is being drawn, accumulating strands or bunches (beards) about or around the rolls, and consequently injuriously affecting the regularity of the sliver.

The improvements which form the subject of the present invention obviate all these inconveniences, and in order to leave no doubt as to the nature of the improvements I refer in the following description to the annexed drawings, upon which- Figure l is alongitudinal elevation, partly in section, of a pair of rolls of a drawing apparatus, the rolls being arranged according to my invention. Fig. 2 shows in a similar view a modified arrangement for driving these rolls.

The draw or draw-olf roll, properly speaking, (marked A,) may be constructed as usual. It is shown grooved, asis customary, and its necks or ends a a are journaled in the ordinary way in the supports B B of the frame of the machine. The rotation of this cylinder is efiected in any ordinary manner. The pressure-roll arranged above the drawing-rollis made in three parts. It comprises a central portion 0, furnished with leather or any other compressible material, and two sleeves or sockets d and d, in which the said central part is journaled and which are themselves freely adjusted or fitted in the supports B and B of the frame, with this special feature, that they ,can not only move freely in the supports in a vertical direction, but can also rotate freely contrary to what is usually the case.

According to my invention the roll A is provided opposite the sockets d d with gearwheels f and f, respectively engaging with corresponding gears g and g, formed upon the said sockets. Lastly these sockets, and with them the pressure-cylinder, tend to be constantly brought toward the drawing-cylinder A by means of weights suspended from the hooks hand h. By means of this arrangement the pressure-roll C is subject, as regards its being driven, to two separate actions. In the first place, by reason of the rotation imparted to the sockets by the aforesaid gear-wheels the pressure-roll is driven by the friction of its bearings in the said sockets. This effect can be explained in the following manner: It the pressure-roll and its sockets be lifted in suchmanner that all contact with the cylinder A isavoided, the rotation imparted to the sockets is-transmitted integrally to the cylinder proper, O. In

the second place, regard being had to the pressure exerted upon the sockets d and d, and consequently upon the pressure-roll relatively to be driven.

to the roller A, the elastic or compressible part of the said roll 0 is impressed into the grooves of the roll A and also causes roll 0 The first of these forces thus assists the second as regards driving, since it tends itself to cause the movement of rotation of the prcssure-roll. Further, it avoids the frictional resistance of the bearings of the roll in the sockets, in this sense, that the sockets are themselves put in motion. The drawing along of the pressure-roll is thus opposed only by the force which the cylinders have to exert to draw out the fibers. Now

.this force is relatively not very considerable,

and the result is that the band or sliver drawn is more regular and free from cuts or damage.

The above-described arrangement, based upon the combination of a free pressure-roll with governed sockets which participate in its movement while allowing the same, nevertheless, the greatest liberty of action, would aiford for this reason alone a marked advantage over pressure-rolls which are connected by means of gear-Wheels to the corresponding drawing-rollers. With such an arrangement there would be produced in reality an alteration of the surface of the pressure-cylinder, inasmuch as the theoretical diameters of the cylinders face to face could never be strictly the same.

According to the principle of which the technical results have been above set forth I may also arrange the pressure-cylinder as shown in Fig. 2. In this modification I still use the sockets d and d with their special drive by means of gear-wheels; but the central part of the pressure-cylinder is here formed of movable faces or bosses 11 and 1 (two in the arrangement illustrated,) mounted upon intermediate sleeves and loosely slipped or threaded upon a shaftj, of which the extremities are of square section and are inserted in the sockets d and d, which are of corresponding shape. Upon this shaft (centrally where two movable faces or sleeves t' t" are used) is a hook it, intended to support a weight to afiord the necessary pressure. In this modification the technical results are the same. The sockets being driven draw with them, by the intermediary of the central shaft j, the two movable faces 1' and 11. Further, under the influence of the pressure the driving of these faces is direct and takes place without the shaft j setting up a frictional resistance, since this shaft turns with the sockets d and 61'. Naturally the independent part C of the pressure-roll, which has been up to this point considered as having an active surface formed of an elastic or compressible substance, can be made of a rigid material-that is to say, this part 0 may be wholly metallic and smooth, which Will not affect the eifects produced or the result to be obtained. It is to be understood also that I do not restrict myself as regards the shapes, dimensions, or materials to be employed for the improved drawing-off system above described, and I reserve the right to apply this wherever suitable, either as an independent apparatus or as an accessory to any spinning or combing apparatus.

I claim as my invention 1. In drawingapparatusforspinning,combing and the like machines, the combination with rotating drawing-rolls, of pressure-rolls, comprising a central part for one of the rolls free to turn, sockets therefor, means to rotate said sockets from the drawingrolls, and counter-weights, substantially as and for the purpose set forth.

2. In a drawing-frame for spinning, combing and like machines, the combination with rotating drawing-rolls, of a central part 0 for one of the rolls, sockets therefor having gearwheels adapted to rotate them, said sockets mounted to be vertically movable in the frame, and said part 0 being adapted to rotate freely in the sockets, and co unterweights, substantially as and for the purpose described.

3. In drawing apparatus for spinning,combing and like machines, the combination of a drawing-roll, a pressure-roll, sockets therefor adapted to be rotated by said drawing-roll, the pressure-surface of the pressure-roll being adapted to rotate freely independently of the sockets, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FREDERIO TER WEELE.

Witnesses:

CHARLES DoNY, EDWARD P. MAOLEAN. 

